All second aorist have somewhat different stems from the present tense as opposed to the same stem as in the first aorist. This makes the slightly irregular. They can either be formed by altering the verb stem, augmenting the first stem, or by adding secondary endings to the verb stems They however are not translated different than the first aorist.
Second aorist verbs are unique in that they have no tense formative but they still contain an augment, as do all aorist verbs.
This is not to be confused with second aorist participles, which do have a tense formative tense formative and an augment. The second aorist participle is especially difficult for Greek students because the active and middle forms have the same morpheme and tense formative as the present.